Make Praefect's production database available on Postgres.ai
There is a request by the Gitaly team to make the praefect DB available in postgres.ai: gitlab-org/gitaly#4077
The praefect DB is living in CloudSQL so this requires to find a way to sync the data over to postgres.ai, as described by @NikolayS: gitlab-org/gitaly#4077 (comment 858911056)